Michael Greenstone, a leading economist from the University of Chicago, sheds light on the staggering global impact of air pollution, linking it to 7 million deaths annually. He discusses how even low levels of particulate matter can impair cognitive function, with revealing studies showing significant declines in memory and decision-making abilities. Greenstone also highlights the economic ramifications of pollution, making a compelling case for stricter regulations as a means to protect public health and enhance productivity.